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911761c230
Extend some structs to add the support for jack button changes. Now snd_hda_jack_add_kctl() receives two more arguments: the jack type and the jack keymaps. Both are optional, and when zero are passed, the function behaves just like before. For reporting button state changes, you'd need to update jack->button_state bits accordingly, typically in the jack callback. Then the value OR'ed with button_state and the jack plug state is passed to snd_jack_report(). Note that currently the code assumes only the one-shot button events, i.e. it tries to send the button release soon after sending the button event. If a driver really supports the button release handling by itself, we may need to introduce some flag to control this behavior in future. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.